That's a bit weird. Or there's a bowden friction, or the cura profile that you used that doesn't do this orints slower. Less perimeters will help, but I also see a problem on how homogeneous the top layer is being printed, and there are gaps between the extrusion lines. Or at least that's what it looks like on the photo. I would blame the bowden angle increasing the pressure, but not sure. Also, while improbable the short belts might have loose tension. Or just maybe is been a long time aince you did a good atomic and particles along hotend/nozzle are increasing the pressure making it harder to keep a constant extrusion. Ofc, also, maybe the filament isn't a perfect 2.85. As you can guess, there are a gazillion things that can go wrong, that why I worked so hard on my printers removing all the possible things that can go wrong. Also imo, for that print, if there are gaps at 3 perimeters is weird, I never use more than 25% infill overlap unless the surface has lots of small areas, if ao I raise to 30 tops or lower nozzle up to 0.33 and increase the infill extrusion to keep the speed, but ofc playing with different and constant changes on the mm2 can (and does) have side effects.

Since I was working from home I tried another one with 30% overlap. Gaps came back

I'm trying one with Cura, I lowered the perimeters to 0.8 and Combing is off. That increased the time from 7.8 hours to over 10! But I am really interested to nail down how to best print pieces like this

And you didn't adjust the temperature? I mean, it uses two different temps, for layer 1 and layer 2-5. Did you readjust all the temps when adjusting parameters? The thing you said on the last post make's me thing that you just need more temperature to compensate for the speed/layer mm2.

Also, are you sure you didn't change anything on the FFF? I don't want a link to the original profile, but the one you are using with any change you did. Anyone, I see that from previous prints, you should by now try to always adjust speed/mm2/heat is mandatory and it changes sometimes from color on the same brand. Specially if you want everything perfect.

Men I think I can't help. The issue I think is on the temp vs speed. And I don't use 2.85mm nor a um2+ feeder, so I think you just need to make small prints (like I always say) to test the issue (save material, learn to adjust temp/speed). I think you just need 5-10C more of temperature, but not sure.